Effects of elliptical nature of rotating electric field on partial discharge pattern in a three-phase construction

Umar Khayam, Toshio Ishitobi, Shinya Ohtsuka, Satoshi Matsumoto, Masayuki Hikita

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Discharge characteristics in single-phase equipment are a well-known and well-established art, however, those in three-phase equipment are far less understood. Because the electric field in the insulating material of three-phase equipment is not linear, but rotates with power frequency, it can be expected that the discharge characteristics in three-phase equipment will be different from those in single-phase equipment. In this paper, the effects of rotating electric field on partial discharge pattern in a three-phase construction are reported. The simplified model of a three-phase GIS with air inside is used. The electric field in the construction was analyzed, and the discharge characteristics were observed. The electric field vector locus in a three-phase construction is elliptical, although the shape differs locally. The elliptical nature of rotating electric field is expressed as an electric field ratio. The experimental results showed that the phase widths where partial discharge current pulses appeared were different depending on the electric field ratio even for the same applied voltage. The phase width where partial discharge current pulses appeared was also influenced by the applied electric field. These results are analysed from the relationship between the value and the locus of the applied electric field and the critical electric field of air.

Original languageEnglish
JournalIEEJ Transactions on Fundamentals and Materials
Volume127
Issue number9
DOIs
Publication statusPublished - 2007
Externally publishedYes

Fingerprint

Partial discharges
Electric fields
Insulating materials
Air
Geographic information systems

Keywords

  • Electric field ratio
  • Phase width where partial discharge pulses appear
  • Rotating electric field
  • Three-phase construction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Effects of elliptical nature of rotating electric field on partial discharge pattern in a three-phase construction. / Khayam, Umar; Ishitobi, Toshio; Ohtsuka, Shinya; Matsumoto, Satoshi; Hikita, Masayuki.

In: IEEJ Transactions on Fundamentals and Materials, Vol. 127, No. 9, 2007.

Research output: Contribution to journalArticle

@article{63540270f72a406880becdd9c2aa9950,
title = "Effects of elliptical nature of rotating electric field on partial discharge pattern in a three-phase construction",
abstract = "Discharge characteristics in single-phase equipment are a well-known and well-established art, however, those in three-phase equipment are far less understood. Because the electric field in the insulating material of three-phase equipment is not linear, but rotates with power frequency, it can be expected that the discharge characteristics in three-phase equipment will be different from those in single-phase equipment. In this paper, the effects of rotating electric field on partial discharge pattern in a three-phase construction are reported. The simplified model of a three-phase GIS with air inside is used. The electric field in the construction was analyzed, and the discharge characteristics were observed. The electric field vector locus in a three-phase construction is elliptical, although the shape differs locally. The elliptical nature of rotating electric field is expressed as an electric field ratio. The experimental results showed that the phase widths where partial discharge current pulses appeared were different depending on the electric field ratio even for the same applied voltage. The phase width where partial discharge current pulses appeared was also influenced by the applied electric field. These results are analysed from the relationship between the value and the locus of the applied electric field and the critical electric field of air.",
keywords = "Electric field ratio, Phase width where partial discharge pulses appear, Rotating electric field, Three-phase construction",
author = "Umar Khayam and Toshio Ishitobi and Shinya Ohtsuka and Satoshi Matsumoto and Masayuki Hikita",
year = "2007",
doi = "10.1541/ieejfms.127.524",
language = "English",
volume = "127",
journal = "IEEJ Transactions on Fundamentals and Materials",
issn = "0385-4205",
publisher = "The Institute of Electrical Engineers of Japan",
number = "9",

}

TY - JOUR

T1 - Effects of elliptical nature of rotating electric field on partial discharge pattern in a three-phase construction

AU - Khayam, Umar

AU - Ishitobi, Toshio

AU - Ohtsuka, Shinya

AU - Matsumoto, Satoshi

AU - Hikita, Masayuki

PY - 2007

Y1 - 2007

N2 - Discharge characteristics in single-phase equipment are a well-known and well-established art, however, those in three-phase equipment are far less understood. Because the electric field in the insulating material of three-phase equipment is not linear, but rotates with power frequency, it can be expected that the discharge characteristics in three-phase equipment will be different from those in single-phase equipment. In this paper, the effects of rotating electric field on partial discharge pattern in a three-phase construction are reported. The simplified model of a three-phase GIS with air inside is used. The electric field in the construction was analyzed, and the discharge characteristics were observed. The electric field vector locus in a three-phase construction is elliptical, although the shape differs locally. The elliptical nature of rotating electric field is expressed as an electric field ratio. The experimental results showed that the phase widths where partial discharge current pulses appeared were different depending on the electric field ratio even for the same applied voltage. The phase width where partial discharge current pulses appeared was also influenced by the applied electric field. These results are analysed from the relationship between the value and the locus of the applied electric field and the critical electric field of air.

AB - Discharge characteristics in single-phase equipment are a well-known and well-established art, however, those in three-phase equipment are far less understood. Because the electric field in the insulating material of three-phase equipment is not linear, but rotates with power frequency, it can be expected that the discharge characteristics in three-phase equipment will be different from those in single-phase equipment. In this paper, the effects of rotating electric field on partial discharge pattern in a three-phase construction are reported. The simplified model of a three-phase GIS with air inside is used. The electric field in the construction was analyzed, and the discharge characteristics were observed. The electric field vector locus in a three-phase construction is elliptical, although the shape differs locally. The elliptical nature of rotating electric field is expressed as an electric field ratio. The experimental results showed that the phase widths where partial discharge current pulses appeared were different depending on the electric field ratio even for the same applied voltage. The phase width where partial discharge current pulses appeared was also influenced by the applied electric field. These results are analysed from the relationship between the value and the locus of the applied electric field and the critical electric field of air.

KW - Electric field ratio

KW - Phase width where partial discharge pulses appear

KW - Rotating electric field

KW - Three-phase construction

UR - http://www.scopus.com/inward/record.url?scp=34548810226&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548810226&partnerID=8YFLogxK

U2 - 10.1541/ieejfms.127.524

DO - 10.1541/ieejfms.127.524

M3 - Article

VL - 127

JO - IEEJ Transactions on Fundamentals and Materials

JF - IEEJ Transactions on Fundamentals and Materials

SN - 0385-4205

IS - 9

ER -